Oman Fawtara e-invoicing: status & guide

This blog post was last updated on July 20, 2026, to reflect the recent go-live of the Fawtara platform Release 2, the initiation of the service provider accreditation process and accreditation of the first service providers, and the announced OTA workshop for in-scope taxpayers ahead of the August 2026 pilot phase.

Oman is launching a mandatory Business-to-Business (B2B) e-invoicing regime under its national program, Fawtara, which is scheduled for a phased rollout starting in 2026. This initiative by the Oman Tax Authority (OTA) aims to digitalize and standardize invoicing across the country, aligning the new system with international standards through the adoption of the Peppol framework. As the Fawtara program advances, the OTA recently published and circulated a draft e-invoicing data dictionary to selected taxpayers on December 1, 2025, providing the first concrete technical requirements for compliant transactions.

Fawtara: The implementation model and phased timeline (planned)

The OTA, which is implementing its national e-invoicing programme, Fawtara, has been approved as a Peppol Authority by OpenPeppol. This is a significant milestone that facilitates the use of a five-corner model, based on the Peppol framework, to manage the reporting and compliance flow: Supplier (Corner 1) supplier’s accredited service provider (Corner 2) buyer’s ASP (Corner 3) buyer (Corner 4), with automatic (near-)real-time reporting to the OTA (Corner 5).

In its capacity as the Peppol Authority, the OTA will set requirements, accredit Access Points, and ensure compliance with the Peppol standards, enabling real-time, structured invoice submission and continuous transaction control.

The rollout is phased, with the implementation roadmap including a sandbox/developer environment in February 2026. Following the June 28, 2026, go-live of the Fawtara platform Release 2, the OTA officially initiated the service provider (Access Point) accreditation process. As of July 2026, a dozen service providers have already completed accreditation to support the five-corner e-invoicing model, with more expected to follow ahead of the pilot phase.

The pilot phase (Phase 1) is still planned to begin in August 2026 for around 100 of the largest VAT-registered taxpayers. Targeted companies for this phase are informed by the OTA and invited to attend workshops ahead of the go-live date. Current OTA communications indicate an expected Phase 2 in early 2027 for the remaining large taxpayers, followed by a Phase 3 in mid‑ to late‑2027 for the remaining VAT‑registered businesses. These 2027 dates should still be regarded as indicative rather than final, with full completion of the Fawtara rollout broadly expected by 2028.

The draft Data Dictionary

The draft Data Dictionary defines the standard data elements, mandatory and conditional fields, validation rules, and code lists for compliant e-invoices under the Fawtara programme. It distinguishes document types (tax invoice, simplified invoice, credit/debit notes, prepayment invoices) and specifies required metadata (UUIDs, invoice hashes, and QR-code/digital signature features for certain simplified invoices). These requirements are described in OTA materials circulated to selected taxpayers and summarised by leading advisory firms.

Practical requirements for businesses

Based on the defined implementation model and the draft technical specifications, companies must address the following practical requirements to ensure a smooth transition to the mandatory e-invoicing framework:

• Large VAT-registered businesses selected for Phase 1 must prepare to issue and receive structured e-invoices in the OTA-specified schema and to integrate with an Accredited Service Provider (ASP) or equivalent channel.

• Systems (ERP/billing) must be able to populate mandatory fields (seller/buyer IDs, VAT details, product classification codes such as HS - Harmonized System codes, the international tariff and product classification used in customs and trade, where applicable, and line-level VAT data) and produce the required metadata (UUID, invoice hash, QR where applicable).

• For simplified/Business-to-Consumer (B2C) invoices, the draft contemplates compact representations and possible QR-code/digital signature requirements. Businesses in retail and hospitality should plan for high-volume processing and potential POS integration.

What remains subject to change / consultation

The draft e-invoicing Data Dictionary is still a draft for consultation. Certain elements, including exact schema versions, and detailed validation rules remain subject to final OTA guidance and potential amendment following stakeholder feedback. Businesses should continue to monitor OTA announcements and advisor updates for further technical specifications and timelines.

Practical next steps

To ensure a smooth and compliant transition to the Fawtara regime, businesses should prioritize the following practical steps as a matter of priority:

1. Determine your phase: Use the OTA's new online VATIN-based rollout checker to confirm your company's inclusion in Phase 1 (pilot), Phase 2, or Phase 3. If selected for an early phase, engage with your ERP/IT teams immediately and monitor your email for an invitation to one of the virtual OTA workshops, which will address various points of interest to impacted taxpayers, such as the final Oman PINT specifications and provider readiness.

2. Review and remediate master data: Ensure buyer/seller legal IDs, customer VAT treatment, and product HS codes are accurate so mandatory fields can be populated.

3. Check Service Provider status: Review the list of accredited service providers to ensure your current or prospective partner is compliant with the Fawtara framework. If you are integrating with a provider, verify they have completed the mandatory OpenPeppol testing and Oman Test Suite requirements.

4. Plan system integration: Integrate with an Accredited Service Provider (ASP) or middleware that supports the five-corner model and OTA reporting.

5. Use pilot/testing windows: Validate message schemas, signatures, QR generation, and high-volume throughput in OTA test portals once available.

Conclusion

Oman’s e-invoicing programme continues to advance, with the draft Data Dictionary setting the foundation for the technical and data requirements businesses must follow. Although the five-corner model and phased rollout have been outlined, several technical details remain under consultation. With the first phase expected to begin in the second half of 2026, companies, especially large VAT-registered taxpayers, should monitor OTA updates and start preparing their systems and data to ensure smooth compliance.

The move to e-invoicing, as seen in Oman and across the globe, is part of a wider shift toward mandatory digital compliance. To ensure your business is prepared for evolving mandates worldwide, from new technical standards to phased rollouts, be sure to sign up for our free monthly compliance newsletter and follow us on LinkedIn.